They would not be released. There are to many quaility assurance checks for this to ever occure. If it did happen, the coins would be melted down, like what happens to old coins and damaged coins.
Misprinted coins can sometimes be worth more to collectors, but it ultimately depends on the specific nature of the misprint and the demand for such items. It's best to consult with a coin expert or collector to determine the potential value of your misprinted 2 dollar coin.
Take it to a coin dealer to see if it has any value. It's likely not a Mint error but has been mutilated.
They are not misprinted, but they are missing the clad plating on one side. Good news for you! These are pretty popular on Ebay right now selling in the $200-$300 dollar range. You have to have the coin certified first and you can do that at http://www.pcgs.com. Good luck!!
A "misprinted" coin is called an "error coin". These occur when there is a malfunction of stamping machines or a case of human error. The result is a coin which is not perfectly struck or has a design flaw. In order to give an accurate estimate of value, the exact nature of the error must be known. Please examine your coin again and then submit a new question giving a description of the error.
i had a coin like that at home and i put it on eBay, it raised about £100.
Check that coin again. The Alaska quarter was minted in 2008.
It wasn't "misprinted". It is an ordinary quarter that was gold plated by a promoter and sold as being something special. Someone probably spent it after they tried to sell it to a coin dealer and was told it was a damaged coin worth only a quarter. In addition it couldn't be dated 1994. All 1994 quarters have the old eagle design on the back. Delaware quarters were struck in 1999.
The coin is likely damaged, but take it to a coin dealer or collector, error coins need to be seen for an assessment.
I don't think I would worry about a bank, you should look for a coin collector in your area. Misprinted money, whether coins or bills, are worth FAR more than the face value.
Not that I am aware of. But if yours dose, bring it to a pro. coin dealer; it might be unique and valuable!
All error coins need to be seen. Take it to a coin dealer in your area.
You didn't state what the error is, but the most famous mistake(*) on 20p coins is a recently-discovered variety that's missing the date. See the related question for more details.(*) Note that paper money is printed, but coins are minted or struck.